I guys databack is an application which gives you data back your used data Even on wifi network. I am using this application for about 1 year and I find that it’s totally fake. Yes it gives databack in your wallet after sinup with any number but it gives limited data back and in past 8 Months I can only save 750MB of data using my phone all day.
It gives 10rs patym or mobile recharge on 150 MB data save but before recharge you have to complete the offer by installing any app they give and using it to 30 sec which is also not worthful.
You don’t any get benefit from it also it drains your battery faster and make your phone slow.
Only and only the developer of this application will get benefit from it by showing adds on your phone when you open thr application.
Also you have to give all permission like access contact, storage, trace location of your phone and many more they want otherwise they will not give anything.
In my opinion you should not waste your time here.
I hope my experience will help you a lot.